Calendar watch



J an. 16, 1928. 1,442,249.

- K. K. BURO.

CALENDAR WATCH.

FILED FEB. 27, 1922.

INVENTOH KamelKBuro A TTOH/VEYS Patented Jan. 16, 192.5.

KAMEL KALLEL BURO,

OF CHICAGO, ILLINOIS.

CALENDAR WATCH.

Application filed February 27, 1922. Serial No. 539,708.

To all whom it may concern.

Be it known that I, KAMEL KALLEL BURO, a citizen of the Republic of France (who has declared his intentions of becoming a citizen of the United States), and a resident of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Calendar Watches, of which the following is a full, clear, and exact description.

My invention relates to improvements in calendar watches, and it consists in the 001m binations, constructions and arrangements herein described and claimed.

An object of my invention is to provide a calendar Watch for indicating the day of the week and the day of the month in addition to the time of the day.

A further object of my invention is to provide a device of the character described which may be inserted in an ordinary type of watch after the Watch is manufactured.

A further object of my invention is to provide a device of the character described r in which the several indicating hands may be set, one independent of the other.

A. further object of my invention is to prcwide a device of the character described, which has relatively few parts, which is compact in form and which is thoroughly practical for the purpose intended.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claim.

My invention is illustrated in the accompanying drawings, forming part of this application, in which Fig. l is a front elevation of a watch showing an embodiment of my invention, the dial of the watch being removed,

Fig. 2 is a fragmentary view of a portion of the mechanism illustrated in Fig. 1, and

Fig. 3 a front elevation of my calendar watch with the dial in place.

I am aware of the fact that calendar watches which indicate the day of the week and the day of the month have been con structed. My present invention. however, provides a mechanism having less parts than such devices as are known at present in the art and the mechanism is extremely compact in form and may be constructed into the ordinary type of watch after it has been manufactured.

In carrying out my invention, I make use of a watch 1 having a casing 2 and a driven gear 3, by means of which the hour hand 4 of the watch 1 is moved. A pinion 5 is disposed on the shaft 6 of the d riven gear wheel 3 and provides the means for driving my calendar mechanism. A pair of gear wheels 7 and 8 are rotatably mounted upon shafts 9 on the outer face 10 of the works of the watch. The gear wheels 7 and S are disposed one on each side of the center of the watch, i. e., a line drawn through the crown 11 to the shaft'6, and have their teeth 12 in mesh with the teeth of the pinion 5. A star wheel 13 is rotatably mounted upon a shaft 14 and is arranged to overlap the gear wheel 8. The star wheel 13 is provided with seven points, as shown at 15 in Fig. 1, one for each day of the week. The gear wheel 8 is provided with. an upwardly extending pin 16 disposed on the outer face thereof and arranged so that it will engage one of the points 15 of the star wheel 13 as it is rotated to cause the star wheel to move one-seventh of a revolution.

Means for yieldably holding the star wheel 13 in an operative position is provided in a pivotally mounted escapement pawl 17. The pawl 17 is provided with two fingers 18 and 19. The finger 18 is normally held in engagement with the star wheel '1? by means of a band spring 20 secured upon the face 10 of the .vatch works at Vhen the star wheel 18 is moved by means of the pin 16, the spring :20 will yield to pressure thereon and allow the star wheel 1?) to move.

Means for setting, i. 0., moving the star wheel 13 independent of the action of the pin 16. or any other part of the mechanism, is provided in a pivotally mounted dog 22. The dog 22 is normally held in the position shown in. full lines in Fig. 1 by means of a band spring 23 fixed upon the face 10 by means of a screw 2-4. One portion of the dog 22 extends into an opening 26 in the rim 27 of the case 2 so that it, i. e... the portion 25, may be moved manually to cause the dog 2 to move upon its pivotal mounting 28. IVheu the dog 22 is moved. it will cause the pawl 17 to assume the position shown in dotted lines in Fig. l and the finger 19 will engage the adjacent point 15 of the star wheel 13 to cause the star wheel to move one-seventh of a revolution. This operation is repeated until the wheel assumes the position desired.

Means for indicating the day of the month is provided in a mechanism similar to the mechanism heretofore described and consists in a star wheel 29 which is rotataloly mounted upon a shaft 30 and arranged to overlap the gear wheel 7 The star wheel 29 is provided with thirty-one points, one for each day of the month. An upwardly extending pin 31 is disposed on the outer face of the gear wheel 7 and is arranged to engage one of the teeth 32 of the star wheel 29 to cause the star wheel 29 to move one-thirty-first of a revolution when the gear wheel 7 makes one revolution.

An escapement pawl 33 similar in construction to the pawl 17 is provided and has fingers 34 and 35. The finger 35 is normally held in engagement with the star wheel 29 of the band spring 36. The spring 36 is fixed upon the face 10 of the watch works by means of a screw 37.

A dog 38 is pivotally mounted upon a center 39 and has a portion e0, which is arranged to extend into an opening 4-1 in the rim 27 of the case 2. A spring 42 similar to the spring 23, serves as a means for holding the dog 38 out of engagement with the pawl 33. When the portion a is manually moved, the dog 38 will engage the pawl 33 and cause the linger 3a to engage one of the teeth 32 of the star wheel 29 and the star wheel 29 will be moved one-thirtyfirst of a revolution. This operation may be repeated until the star wheel assumes the position desired.

An indicating hand 13 provided and arranged to move with the star wheel 29.

Another hand 4.4L is provided and. is arranged to turn with the star wheel 13. Referring now to Fig. 3, the dial i is provided with two relatively small dials as and 47. The dial 4:6 is divided into seven parts and has legends inscribed thereon representing the days of the week. The hand 44 is arranged to move upon this dial. The dial 47 is divided into thirty-one parts and has legends thereon indicating the days of the month, every alternate day excepted. The hand 4:3 is arranged to move upon the dial 47.

For the purpose of illustration, I have shown in Fig. 2 in full and dotted lines: the action of the pin 16 as it engages the star wheel 1.3. It will be noted that as the pin 16 engages one of the points of the star wheel. it will push that point in a clockwise direction and become disengaged therewith when the star wheel has moved one-seventh of its revolutionf During this action, the band spring will yield to the positive action of the pin 16 in its engagement with one of the points 15. The action of the pin 31 and the star wheel is precisely like the action of the pin 16 and the star wheel 13. It is therefore believed that a detailed explanation of the latter action of the pin 31 and the star wheel 29 is therefore unnecessary.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. One of the important advantages in the construction of my present invention is that the hands 4-3 and 44k actuated by the star wheels 29 and 13, respectively, may be set independent of each other and independent of the operation of the watch or mechanism driving the starwheel. This is accomplished by means of dogs 38 and 22, respectively, in the manner hereinbefore described.

It should be noted that two complete revolutions of the pinion 5 are necessary for one complete revolution of either of the gear wheels 7 and 8. This gear ratio is established so that the star wheels 29 and 13 will not be moved at twelve oclock of the noonday, but only at twelve oclock midnight, i. e., once every twenty-four hours. It should also be noted that in my present con struction, the relative arrangement of the various parts provides a compact mechanism, which takes up but a small portion of the face 10 of the work. For this reason it is possible to insert my calendar mechanism in the ordinary type of watch by merely providing the pinion 5 on the driven gear wheel 3 and fixing the several parts of the mechanism heretofore described upon the face 1.0 of the watch works.

Another of the important advantages of my present invention is that my calendar mechanism may be embodied in a regular 12 size American watch. This is made possible because of the extreme compactness brought about by the particular structure heretofore described.

I claim:

In a device of the character described, a star wheel, means for moving said star wheel a fraction of a revolution at periodic intervals, a recoil escapement pawl pivotally mounted adjacent said star wheel and adapted to engage therewith to normally permit the movement of said star wheel in one direction, a spring for normally holding said pawl in yielding engagement with said star wheel, a dog pivotally mounted intermediate its length, and arranged with its innermost end adapted for engagement with said escapement pawl when said dog is oscillated, and a spring for normally holding said dog out of engagement with said escapement pawl.

KAMEL KALLEL EURO, 

